It's important to understand that everyone only has the animals best interests in mind. I know you do too, but this is why it's important to fully understand your capabilities. I take alot of rescues in myself but I at times when I have too many at once have had to turn one down. It's really hard to do that. But I have to give everyone their own space. I hope that you have separated them and have learned a really hard crappy lesson. You should never house 2 or more together and you should especially never feed together. It's important to know everything you can about any animal you take in and never assume with them. They have wild instincts. There has been cases of canabalism and suffocation when more than one bp is housed together. Not to mention over crowding and dominance will stress any animal out.
Also dipping a rat in chicken broth will do nothing to help the animal eat. Possibly the reason he isn't eating is bc of the over crowded cage. Using a uth without a thermostat is also putting the animals at high risk for thermal burns. They get extremely hot and bp don't have the same pain receptors we do. They will sit on an over heating uth and burn themselves very badly to the point of death at times.
Everyone on here deeply cares about not just their own animals but the whole communities. Even though the advice may be harsh it is the truth and it should be heeded. I think that if you are serious about wanting and keeping these animals you must do the things everyone is suggesting, ask as many questions as you can and research everything as much as you can. Read everything about them. We all start somewhere, it's just important to not accidentally get over your head and cause more harm. Its for the good of the animals. And they deserve the best.
For the treatment of the bite. Don't use neosprorine at all. It actually does more harm than good. It's oil based and softens their scales, possibly making them more suceptable to further injury. Go to your local drug store and get Betadyne, it's an iodine solution and cleans wounds very well. You should get a qtip and dip it in the betadyne and put it right on the wound. This will heal it nicely, and not soften his scales. Do this 2x daily. I hope this helps in some way.
Morgan
Ps sorry it's long winded.